State advantages and disadvantages of expansion of solid

Explanation:

First Calculate Total Equivalent Resistance (Series) :

[tex]R_{eq} = r_{1} + r_{2} = 23 \: ohms[/tex]

(A) Current in each resistor :

[tex]I = \frac{V}{R} = 0.78 \: A[/tex]

(Since this is a series connection, the electric current is same through both resistor).

(B) Potential Difference across the first resistor :

[tex]V = IR = 0.78 \times 19 = 14.82 \: V[/tex]

(B) Potential Difference across the second resistor :

[tex]V = IR = 0.78 \times 4 = 3.12 \: V[/tex]

Answer:Acids and bases cannot mix together. Acids and bases will neutralize each other. Acids, but not bases, can change the pH of a solution. Acids donate hydroxide ions (OH–); bases donate hydrogen ions (H+)

Answer:

The maximum static frictional force is 40N.

Explanation:

When an object of mass M is on a surface with a coefficient of static friction μ, there is a minimum force that you need to apply to the object in order to "break" the coefficient of static friction and be able to move the object (Called the threshold of motion, once the object is moving we have a coefficient of kinetic friction, which is smaller than the one for static friction).

This coefficient defines the maximum static friction force that we can have.

So if we apply a small force and we start to increase it, the static frictional force will be equal to our force until it reaches its maximum, and then we can move the object and now we will have frictional force.

In this case, we know that we apply a force of 40N and the object just starts to move.

Then we can assume that we are just at the point of transition between static frictional force and kinetic frictional force (the threshold of motion), thus, 40 N is the maximum of the static frictional force.

Answer:

Energy is neither created nor destroyed.

Explanation:

Answer:10

Explanation: if you look it has a 170 but some people have 70 if you have 170 then it will be 10 if you have a 70 then it will be 110 if I'm right then Yw

Answer:

10

Explanation:

i took the quiz xoxo

Answer:

You first push in then when the syringe is full push the out

Explanation:

1. in

2. out

but u should watch a You-tube video just in case

I hoped this helped!

Answer:

8900 J

Explanation:

Let heat absorbed be Q1 and heat rejected be Q2.

Q1 = 1000 J, efficiency η = 11% = 0.11

Then, Efficiency of engine can be found be using the following formula,

[tex]\eta = \frac{Q_1-Q_2}{Q_1}[/tex]

⇒ [tex]0.11 = \frac{10000-Q_2}{10000}\\Q_2 = 10000- 1100= 8900 J[/tex]

Therefore, energy does it expels to the environment per cycle = 8900 J

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Answer:

1080000

Explanation:

300 x 60s=18000m/minute

18000 x 60min=1080000m/h

Explanation:

Answer:

v = 135.13 mph

Explanation:

Given that,

The race car was moving for 3.7 hours and during that time it traveled a distance of 500 miles south.

We need to find the speed of the car.

We know that,

Speed = distance/time

So,

[tex]v=\dfrac{500\ miles}{3.7\ h}\\\\v=135.13\ mph[/tex]

So, the speed of the car is equal to 135.13 mph.

Answer:

See Explanation

Explanation:

While it is true that a version of the second law of thermodynamics stated with respect to entropy states that the entropy of  a system only increases or remains the same. It never decreases!

It then appears to be a contradiction when the freezing of ice leads to a more ordered structure and a seeming decrease in entropy of the ice as water changes from liquid to solid.

This law of thermodynamics is not violated here because the entropy of the universe increases (freezing is an exothermic process). This outweighs the decrease in entropy of the system hence the change in entropy is positive and the second law of thermodynamics is not violated.

Answer:

W= 210 N

Explanation:

Just use work = Fparallel*d

W= 35*6

W= 210 N

Answer:

x rays is the correct answer

A

Explanation:

When a liquid occupies a smaller volume, it exerts a higher pressure; when it occupies a larger volume, it exerts a lower pressure.

volume= mass÷density

A- 10÷2= 5cm³

B- 20÷1.6= 12.5cm³

C- 30÷1.2= 25cm³

D- 40÷0.7= 57.1cm³

Answer:

Explanation:Wave length of a sound wave = speed / frequency1) 340 m/s / 880 Hz

Answer:

0.386m

Explanation:

                       Speed

Wavelength = -----------------

                       Frequency

                       340m/s

Wavelength = -------------- = 0.386m

                       880 Hz

Answer:

d

Explanation:

astroids are not the same size so if a big astroid gets to close to a small one they will make contact or the small astroid will orbit the bigger one

Answer:

D.

Explanation:

I think don't quote me tho

Answer:

The catapult works when the potential energy stored in a stretched rubber band is converted to kinetic energy when it snaps back to its loose shape, moving the catapult arm—and the projectile! ... The kinetic energy of the catapult will give the projectile a force moving up and away from the catapult.

Explanation:

Answer:

1- C   2-B    3-B   - these are ur best answers

Explanation:

Answer:

1. C(bone structure)

2. B (Common ancestor)

3.D (DNA)

Explanation:

Answer:

I think its A

Explanation:

if its every 3 seconds wouldnt it be 3.0 Hz

Answer:

Explanation:

There are 3 main forces at work here, gravity, normal and friction. The gravity pulls the car straight down and is what keeps the car on the ground. Normal force is straight up from the points where the car is touching, so since the wheels are the only parts of the car touching the street, this is where all the normal force is. Friction force opposes any and all motion, the car wants to slide down the hill and would slide down the hill if there was no friction, so the friction force is in the opposite direction of the cars intended motion.

Explanation:

Examples for effect of force - example

1) Can change the state of an object(rest to motion/ motion to rest):For example, pushing a heavy stone in order to move it. 2) May change the speed of an object if it is already moving. ... 3) May change the direction of motion of an object.

Answer: Carbohydrates , proteins and lipids are large molecules that are needed by the body for growth, repair and metabolism . They are found in our food. These molecules are too large to pass from the intestine into the blood, so digestive enzymes break them down into smaller molecules.

Explanation:

Answer:

Digestion is the mechanical and chemical break down of food into small organic fragments. It is important to break down macromolecules into smaller fragments that are of suitable size for absorption across the digestive epithelium. Large, complex molecules of proteins, polysaccharides, and lipids must be reduced to simpler particles such as simple sugar before they can be absorbed by the digestive epithelial cells. Different organs play specific roles in the digestive process. The animal diet needs carbohydrates, protein, and fat, as well as vitamins and inorganic components for nutritional balance. How each of these components is digested is discussed in the following sections

Answer:

W = mg

Explanation:

The formula of Weight for given mass is

[tex]\large\boxed{\fcolorbox{blue}{yellow}{W = mg}}[/tex]

where,

m = mass of the body

g = accelaration due to gravity

For Example:

Q.) A body has mass 10 kg then fine it's weight

A.)

m = 10kg

g = 10m/s²

.°. W = mg

= 10 × 10

W = 100N

Thus, The weight of a body from its mass can be calculated by W = mg.

-TheUnknownScientist

Answer:

The closer and bigger the star, the larger the star appears.

Explanation:

Since the sun is closer to us it shows up way larger than other stars in our galaxy.

Have a great day.

Answer:

It is the closest star to us. other bigger stars may seem small, but that is because they are far away. The more closer an object is, the smaller it seems to be.

Explanation:

Hope this helps!

Answer:

cause why not.

the layers exist cause theoretically the deeper you go the hotter it gets and different atoms just do stuff

Answer:

hmmmmm

Explanation:

I am gonna say D.

if I am right plz give me a brainliest

Answer:

1.865 * 10^-4 L

Explanation:

The equation of the reaction is:

4OH^-(aq) ----->2H2O(l) + O2(g) + 4e

Since one mole of oxygen which occupies 22.4 L is produced in the electrolysis of water by 4 Faraday of electricity as shown in the equation above;

Then;

4 * 96500 C liberates 22.4 L of oxygen

60 * 60 * 0.0200 C will liberate 60 * 60 * 0.0200 *  22.4/4 * 96500

= 1.865 * 10^-4 L